High-resolution profiling of oxylipin-containing galactolipids in Arabidopsis extracts by ultra-performance liquid chromatography/time-of-flight mass spectrometry

Glauser, Gaétan; Grata, Elia; Rudaz, Serge; Wolfender, Jean-Luc

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Title		High-resolution profiling of oxylipin-containing galactolipids in Arabidopsis extracts by ultra-performance liquid chromatography/time-of-flight mass spectrometry
Authors		Glauser, Gaétan Grata, Elia Rudaz, Serge Wolfender, Jean-Luc
Published in		Rapid Communications in Mass Spectrometry. 2008, vol. 22, no. 20, p. 3154 - 3160
Abstract		A high-ltra-performance liquid chromatography/time-of-flight mass spectrometry (UPLC/TOFMS) method using in-source collision-induced dissociation (CID) was developed for globally profiling oxylipin-containing galactolipids in Arabidopsis wounded leaves. MS and pseudo-MS/MS spectra were obtained during a single analytical run by switching a lens of the TOFMS transfer optics from low to high voltage. Numerous known galactolipids were observed, and four novel mono- or di-galactosyl monoacylglycerides (MGMGs or DGMGs) containing oxophytodienoic acid (OPDA) or dinor-oxophytodienoic acid (dn-OPDA), esterified respectively at the sn1 and the sn2 positions, were identified. Rapid microisolation of the galactolipids followed by alkaline and enzymatic hydrolyses enabled the release of the esterified oxylipins, which allowed for the unambiguous characterization of the oxylipin-containing monoacylglycerides. Their strong induction in response to wounding indicates that these compounds are probably lysogalactolipids formed from galactosyldiglycerides in the injured tissues.resolution u
Keywords		UHPLC — UHPLC-TOFMS — Galactolipids — Arabidopsis — Arbidopsides — Monoacylglycerides — Wounding
Identifiers		DOI: 10.1002/rcm.3716
Full text		Article (Published version) (136 Kb) - Limited access to UNIGE Other version: http://doi.wiley.com/10.1002/rcm.3716
Structures		Faculté des sciences / Section des sciences pharmaceutiques
Citation (ISO format)		GLAUSER, Gaétan et al. High-resolution profiling of oxylipin-containing galactolipids in Arabidopsis extracts by ultra-performance liquid chromatography/time-of-flight mass spectrometry. In: Rapid Communications in Mass Spectrometry, 2008, vol. 22, n° 20, p. 3154 - 3160. https://archive-ouverte.unige.ch/unige:10813